{
  "manageEntity": {
    "action": "Create",
    "entityId": "402485900",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":52309,\"entity_id\":2031005726,\"body\":\"hot damn!\",\"track_timestamp_s\":60}}",
    "nonce": "0xad150352ecb466606cee37f74c7ffa56be66b6138e54db34b7d509e326f70278",
    "signature": "0x077318636b833ec834fbbe0ce9d7082a2bf37c845745c0171bf8780dd6e9c3f45f14bbf0c92534cc104e4eb1c9a869f6ffe3f542275e86192f7c3ca14eabf7301b",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}